/* Old Iron Files v2: parts-catalogue feel. Deep green + rust, slab headings, big readable type for older readers */
:root{
  --bg:#f6f3ea; --paper:#fffdf7; --ink:#1d221e; --muted:#59605a; --line:#ddd7c8;
  --green:#24402c; --green2:#2f6a3f; --rust:#b0501d; --tint:#ecf0e6; --warn:#fff4e0;
  --head:"Roboto Slab",Georgia,serif; --body:"Source Sans 3",system-ui,sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#141815; --paper:#1b201c; --ink:#e8ebe6; --muted:#a6aea6; --line:#2f3630;
  --green:#1d3324; --green2:#8fc59b; --rust:#f08a55; --tint:#212a23; --warn:#2c2417; color-scheme:dark}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:19px;line-height:1.65}
a{color:var(--green2)}
img{max-width:100%;height:auto;display:block}
.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:9}
.bar{max-width:1120px;margin:0 auto;padding-inline:16px}
h1,h2,h3{font-family:var(--head);line-height:1.2;text-wrap:balance}
.label{font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--green2);margin:0}
.kick{display:block;font-size:12px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--rust)}
.kick.big{font-size:14px;margin:18px 0 0}
.small{font-size:15px;color:var(--muted)}
.btn{display:inline-block;background:var(--green);color:#fff;text-decoration:none;font-weight:700;padding:10px 18px;border-radius:8px}
@media (prefers-color-scheme:dark){.btn{background:#2f6a3f}}

/* header */
.top{background:var(--green);color:#fff}
.top .bar:first-child{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;padding-block:12px}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--head);font-weight:800;font-size:24px;color:#fff;text-decoration:none}
.mark{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:8px;background:#fbf8f1;color:var(--green);font-size:14px;border-bottom:4px solid #c4622d}
@media (prefers-color-scheme:dark){.mark{color:#24402c}}
.hsearch{display:flex;flex:1 1 260px;max-width:380px}
.hsearch input,.bigsearch input{flex:1;min-width:0;font:inherit;font-size:17px;padding:9px 12px;border:0;border-radius:8px 0 0 8px;background:#fff;color:#1d221e}
.hsearch button,.bigsearch button{font:inherit;font-size:16px;font-weight:700;border:0;border-radius:0 8px 8px 0;padding:0 14px;background:#c4622d;color:#fff;cursor:pointer}
.cats{display:flex;flex-wrap:wrap;gap:4px 18px;padding-block:6px 12px}
.cats a{color:#fff;text-decoration:none;font-weight:600;font-size:16px;opacity:.92;padding:2px 0}
.cats a:hover{text-decoration:underline}
main{max-width:1120px;margin:0 auto;padding:12px 16px 56px}
section{margin-top:40px}
.sec{font-size:26px;margin:0 0 14px;padding-bottom:6px;border-bottom:3px solid var(--rust);display:inline-block}

/* home */
.homehero{margin-top:12px;background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:22px 22px 18px;border-top:6px solid var(--rust)}
.homehero h1{font-size:clamp(30px,5vw,48px);margin:6px 0 10px;max-width:22ch}
.lead{font-size:20px;color:var(--muted);max-width:62ch;margin:0 0 16px}
.bigsearch{display:flex;max-width:560px;margin:8px 0 10px}
.bigsearch input{border:2px solid var(--green);border-right:0;padding:12px 14px;font-size:18px}
.bigsearch input:only-child{border-right:2px solid var(--green);border-radius:8px}
.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.tile{display:flex;flex-direction:column;gap:4px;background:var(--paper);border:1px solid var(--line);border-left:6px solid var(--green2);border-radius:10px;padding:16px 18px;text-decoration:none;color:var(--ink)}
.tile:hover{border-color:var(--rust)}
.tname{font-family:var(--head);font-weight:800;font-size:21px}
.tblurb{color:var(--muted);font-size:16px}
.tcount{font-weight:700;color:var(--green2);font-size:15px;margin-top:4px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:32px}
@media (max-width:760px){.split{grid-template-columns:1fr}}
.rank{margin:0;padding-left:26px;font-family:var(--head);font-size:19px}
.rank li{padding:8px 0;border-bottom:1px solid var(--line)}
.rank a{color:var(--ink);text-decoration:none}.rank a:hover{color:var(--green2);text-decoration:underline}
.trust{display:grid;grid-template-columns:1.2fr 1fr;gap:24px;background:var(--tint);border-radius:14px;padding:22px}
.trust h2{margin-top:0}
@media (max-width:760px){.trust{grid-template-columns:1fr}}

/* cards + lists */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:18px}
.card{display:flex;flex-direction:column;background:var(--paper);border:1px solid var(--line);border-radius:12px;overflow:hidden;text-decoration:none;color:var(--ink)}
.card:hover{border-color:var(--green2)}
.card .thumb{width:100%;aspect-ratio:1200/630;object-fit:cover;background:var(--green)}
.cbody{padding:14px 16px 16px;display:flex;flex-direction:column;gap:4px}
.card h3{margin:0;font-size:20px}
.card p{margin:0;color:var(--muted);font-size:16px}
.rows{list-style:none;margin:0;padding:0}
.rows li a{display:block;padding:10px 0;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink)}
.rows li a:hover strong{text-decoration:underline;color:var(--green2)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:10px}
.chips a{background:var(--paper);border:1px solid var(--line);border-radius:999px;padding:4px 12px;text-decoration:none;font-weight:600;font-size:16px}
.chips span{color:var(--muted);font-weight:400}
.brand-sec h3{margin:22px 0 4px}
.hubhead h1{font-size:clamp(30px,5vw,44px);margin:4px 0 8px}
.covers ul{display:flex;flex-wrap:wrap;gap:6px 18px;padding-left:18px;margin:6px 0 0}
.empty{color:var(--muted)}

/* article */
.crumbs{font-size:15px;color:var(--muted);margin-top:10px}
.crumbs a{color:var(--muted)}
.art{max-width:740px;margin:0 auto}
.art h1{font-size:clamp(30px,5vw,44px);margin:6px 0 10px}
.dek{font-size:21px;color:var(--muted);margin:0 0 8px}
.byline{font-size:15px;color:var(--muted);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:8px 0}
.byline a{color:var(--muted)}
.hero-img{margin:18px 0}
.hero-img img{border-radius:10px;width:100%}
.hero-img figcaption{font-size:14px;color:var(--muted);margin-top:6px}
.facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));margin:20px 0;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--paper)}
.facts div{padding:10px 14px;border-bottom:1px solid var(--line)}
.facts div:nth-child(odd){border-right:1px solid var(--line)}
.facts dt{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--rust)}
.facts dd{margin:2px 0 0;font-weight:600}
@media (max-width:520px){.facts{grid-template-columns:1fr}.facts div:nth-child(odd){border-right:0}}
.toc{background:var(--tint);border-radius:10px;padding:14px 18px;margin:0 0 24px;font-size:17px}
.toc ol{margin:6px 0 0;padding-left:22px}
.quick,.warn{border-left:5px solid var(--rust);background:var(--paper);padding:14px 18px;margin:0 0 20px;border-radius:0 10px 10px 0}
.quick p,.warn p{margin:4px 0 0}
.warn{background:var(--warn);border-color:#d99a2b}
.body h2{font-size:28px;margin:38px 0 10px}
.body h3{font-size:22px;margin:26px 0 6px}
.body li{margin:4px 0}
.tablewrap{overflow-x:auto;margin:16px 0;border:1px solid var(--line);border-radius:10px}
table{border-collapse:collapse;width:100%;font-size:17px;background:var(--paper)}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--tint);font-weight:700}
.find{background:var(--paper);border:2px solid var(--green2);border-radius:12px;padding:16px 18px;margin:34px 0}
.fh2{font-size:22px;margin:0 0 10px}
.find ul{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.find li a{display:flex;flex-direction:column;padding:10px 14px;border:1px solid var(--line);border-radius:8px;text-decoration:none;color:var(--ink)}
.find li a:hover{border-color:var(--rust)}
.find li strong{color:var(--green2)}
.find li span{font-size:16px;color:var(--muted)}
.faq details{border-bottom:1px solid var(--line);padding:12px 0}
.faq summary{font-weight:700;cursor:pointer}
.sources{margin-top:30px;font-size:16px}
.sources h2{font-size:22px}
.sources ul{padding-left:20px;color:var(--muted)}
.authorbox{display:flex;gap:14px;align-items:flex-start;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:16px;margin-top:26px}
.authorbox p{margin:2px 0}
.avatar{flex:none;width:52px;height:52px;border-radius:50%;display:grid;place-items:center;background:var(--green);color:#fff;font-family:var(--head);font-weight:800;font-size:15px}
.more{max-width:1120px}
.video{font-weight:600}
.results{list-style:none;padding:0}
.results li a{display:flex;flex-direction:column;padding:12px 0;border-bottom:1px solid var(--line);text-decoration:none;color:var(--ink)}
.results li a span:last-child{color:var(--muted);font-size:16px}

/* footer */
.foot{background:var(--paper);border-top:1px solid var(--line);color:var(--muted);font-size:16px}
.fcols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px;padding-block:28px}
.fcols a{display:block;color:var(--ink);text-decoration:none;padding:3px 0}
.fcols a:hover{text-decoration:underline}
.fcols p a{display:inline;color:var(--green2)}
.fbrand{font-family:var(--head);font-weight:800;font-size:20px;color:var(--ink);margin:0}
.fh{font-weight:700;color:var(--ink);margin:0 0 4px}
@media (max-width:760px){.fcols{grid-template-columns:1fr 1fr}.fcols>div:first-child{grid-column:1/-1}}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--rust);outline-offset:2px}

/* v3 (research report): paths, brand tiles, featured, timeline, video, share, ad slots */
.paths{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:14px}
.paths a{display:flex;flex-direction:column;gap:2px;padding:12px 14px;border:2px solid var(--green2);border-radius:10px;text-decoration:none;color:var(--ink);background:var(--bg)}
.paths a:hover{border-color:var(--rust)}
.paths strong{color:var(--green2);font-size:18px}
.paths span{font-size:15px;color:var(--muted)}
@media (max-width:640px){.paths{grid-template-columns:1fr}}
.btiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:10px}
.btile{display:flex;flex-direction:column;gap:2px;padding:14px;border-radius:10px;background:var(--green);color:#fbf8f1;text-decoration:none;border-bottom:5px solid #c4622d}
.btile:hover{filter:brightness(1.15)}
.bname{font-family:var(--head);font-weight:800;font-size:22px;line-height:1.1}
.bmeta{font-size:14px;opacity:.85}
.bcount{font-size:13px;font-weight:700;color:#f0b48a;margin-top:4px}
@media (prefers-color-scheme:dark){.btile{background:#24402c}}
.featured a{display:grid;grid-template-columns:1.1fr 1fr;gap:0;background:var(--paper);border:1px solid var(--line);border-radius:14px;overflow:hidden;text-decoration:none;color:var(--ink)}
.featured .fimg{width:100%;height:100%;object-fit:cover;min-height:240px}
.featured a>div{padding:20px 22px;display:flex;flex-direction:column;gap:8px;justify-content:center}
.featured h2{margin:0;font-size:clamp(24px,3.4vw,32px)}
.featured p{margin:0;color:var(--muted)}
.featured .btn{align-self:flex-start;margin-top:6px}
@media (max-width:760px){.featured a{grid-template-columns:1fr}.featured .fimg{min-height:0;aspect-ratio:3/2}}
.timeline{margin:0 0 24px}
.tl{list-style:none;margin:8px 0 0 6px;padding:0 0 0 22px;border-left:3px solid var(--rust);display:flex;flex-direction:column;gap:10px}
.tl li{position:relative;display:grid;grid-template-columns:5.5em 1fr;gap:10px;align-items:baseline}
.tl li::before{content:"";position:absolute;left:-29.5px;top:.45em;width:11px;height:11px;border-radius:50%;background:var(--paper);border:3px solid var(--rust)}
.ty{font-family:var(--head);font-weight:800;color:var(--green2);font-variant-numeric:tabular-nums}
.tt{min-width:0}
@media (max-width:420px){.tl li{grid-template-columns:1fr;gap:0}}
.watch h2{font-size:24px}
.vwrap{position:relative;aspect-ratio:16/9;max-width:100%;border-radius:10px;overflow:hidden;background:#000}
.vwrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
.share{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px;border:2px dashed var(--green2);border-radius:14px;padding:18px 22px}
.share>div{flex:1 1 380px;min-width:0}.share h2{margin:0 0 6px}.share p{margin:0}
.mail{font-size:18px}
.toolsoon{color:var(--muted)}
.ad-slot:empty{display:none}
.ad-slot{margin:24px 0;min-height:90px}
.art.wide{max-width:1120px}
.letters a{font-family:var(--head);font-weight:800}
.kick a{color:inherit}
.authorbox.big{align-items:center;margin-top:12px}.authorbox.big h1{margin:0;font-size:clamp(28px,5vw,40px)}